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-rw-r--r--arch/sparc/kernel/sun4d_smp.c176
1 files changed, 65 insertions, 111 deletions
diff --git a/arch/sparc/kernel/sun4d_smp.c b/arch/sparc/kernel/sun4d_smp.c
index 482f2ab92692..475d50b96cd0 100644
--- a/arch/sparc/kernel/sun4d_smp.c
+++ b/arch/sparc/kernel/sun4d_smp.c
@@ -1,4 +1,4 @@
-/* sun4d_smp.c: Sparc SS1000/SC2000 SMP support.
+/* Sparc SS1000/SC2000 SMP support.
*
* Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*
@@ -6,59 +6,23 @@
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
-#include <asm/head.h>
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/threads.h>
-#include <linux/smp.h>
#include <linux/interrupt.h>
-#include <linux/kernel_stat.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
#include <linux/profile.h>
#include <linux/delay.h>
#include <linux/cpu.h>
-#include <asm/ptrace.h>
-#include <asm/atomic.h>
-#include <asm/irq_regs.h>
-
-#include <asm/irq.h>
-#include <asm/page.h>
-#include <asm/pgalloc.h>
-#include <asm/pgtable.h>
-#include <asm/oplib.h>
#include <asm/sbi.h>
+#include <asm/mmu.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>
-#include <asm/cpudata.h>
+#include "kernel.h"
#include "irq.h"
-#define IRQ_CROSS_CALL 15
-extern ctxd_t *srmmu_ctx_table_phys;
+#define IRQ_CROSS_CALL 15
-static volatile int smp_processors_ready = 0;
+static volatile int smp_processors_ready;
static int smp_highest_cpu;
-extern volatile unsigned long cpu_callin_map[NR_CPUS];
-extern cpuinfo_sparc cpu_data[NR_CPUS];
-extern unsigned char boot_cpu_id;
-extern volatile int smp_process_available;
-
-extern cpumask_t smp_commenced_mask;
-
-extern int __smp4d_processor_id(void);
-
-/* #define SMP_DEBUG */
-
-#ifdef SMP_DEBUG
-#define SMP_PRINTK(x) printk x
-#else
-#define SMP_PRINTK(x)
-#endif
static inline unsigned long sun4d_swap(volatile unsigned long *ptr, unsigned long val)
{
@@ -69,8 +33,6 @@ static inline unsigned long sun4d_swap(volatile unsigned long *ptr, unsigned lon
}
static void smp_setup_percpu_timer(void);
-extern void cpu_probe(void);
-extern void sun4d_distribute_irqs(void);
static unsigned char cpu_leds[32];
@@ -86,9 +48,8 @@ static inline void show_leds(int cpuid)
void __cpuinit smp4d_callin(void)
{
int cpuid = hard_smp4d_processor_id();
- extern spinlock_t sun4d_imsk_lock;
unsigned long flags;
-
+
/* Show we are alive */
cpu_leds[cpuid] = 0x6;
show_leds(cpuid);
@@ -118,15 +79,15 @@ void __cpuinit smp4d_callin(void)
sun4d_swap((unsigned long *)&cpu_callin_map[cpuid], 1);
local_flush_cache_all();
local_flush_tlb_all();
-
+
cpu_probe();
- while((unsigned long)current_set[cpuid] < PAGE_OFFSET)
+ while ((unsigned long)current_set[cpuid] < PAGE_OFFSET)
barrier();
-
- while(current_set[cpuid]->cpu != cpuid)
+
+ while (current_set[cpuid]->cpu != cpuid)
barrier();
-
+
/* Fix idle thread fields. */
__asm__ __volatile__("ld [%0], %%g6\n\t"
: : "r" (&current_set[cpuid])
@@ -134,16 +95,16 @@ void __cpuinit smp4d_callin(void)
cpu_leds[cpuid] = 0x9;
show_leds(cpuid);
-
+
/* Attach to the address space of init_task. */
atomic_inc(&init_mm.mm_count);
current->active_mm = &init_mm;
local_flush_cache_all();
local_flush_tlb_all();
-
+
local_irq_enable(); /* We don't allow PIL 14 yet */
-
+
while (!cpu_isset(cpuid, smp_commenced_mask))
barrier();
@@ -154,15 +115,9 @@ void __cpuinit smp4d_callin(void)
}
-extern void init_IRQ(void);
-extern void cpu_panic(void);
-
/*
* Cycle through the processors asking the PROM to start each one.
*/
-
-extern struct linux_prom_registers smp_penguin_ctable;
-
void __init smp4d_boot_cpus(void)
{
if (boot_cpu_id)
@@ -173,43 +128,42 @@ void __init smp4d_boot_cpus(void)
int __cpuinit smp4d_boot_one_cpu(int i)
{
- extern unsigned long sun4d_cpu_startup;
- unsigned long *entry = &sun4d_cpu_startup;
- struct task_struct *p;
- int timeout;
- int cpu_node;
+ unsigned long *entry = &sun4d_cpu_startup;
+ struct task_struct *p;
+ int timeout;
+ int cpu_node;
- cpu_find_by_instance(i, &cpu_node,NULL);
- /* Cook up an idler for this guy. */
- p = fork_idle(i);
- current_set[i] = task_thread_info(p);
+ cpu_find_by_instance(i, &cpu_node, NULL);
+ /* Cook up an idler for this guy. */
+ p = fork_idle(i);
+ current_set[i] = task_thread_info(p);
+
+ /*
+ * Initialize the contexts table
+ * Since the call to prom_startcpu() trashes the structure,
+ * we need to re-initialize it for each cpu
+ */
+ smp_penguin_ctable.which_io = 0;
+ smp_penguin_ctable.phys_addr = (unsigned int) srmmu_ctx_table_phys;
+ smp_penguin_ctable.reg_size = 0;
+
+ /* whirrr, whirrr, whirrrrrrrrr... */
+ printk(KERN_INFO "Starting CPU %d at %p\n", i, entry);
+ local_flush_cache_all();
+ prom_startcpu(cpu_node,
+ &smp_penguin_ctable, 0, (char *)entry);
+
+ printk(KERN_INFO "prom_startcpu returned :)\n");
+
+ /* wheee... it's going... */
+ for (timeout = 0; timeout < 10000; timeout++) {
+ if (cpu_callin_map[i])
+ break;
+ udelay(200);
+ }
- /*
- * Initialize the contexts table
- * Since the call to prom_startcpu() trashes the structure,
- * we need to re-initialize it for each cpu
- */
- smp_penguin_ctable.which_io = 0;
- smp_penguin_ctable.phys_addr = (unsigned int) srmmu_ctx_table_phys;
- smp_penguin_ctable.reg_size = 0;
-
- /* whirrr, whirrr, whirrrrrrrrr... */
- SMP_PRINTK(("Starting CPU %d at %p\n", i, entry));
- local_flush_cache_all();
- prom_startcpu(cpu_node,
- &smp_penguin_ctable, 0, (char *)entry);
-
- SMP_PRINTK(("prom_startcpu returned :)\n"));
-
- /* wheee... it's going... */
- for(timeout = 0; timeout < 10000; timeout++) {
- if(cpu_callin_map[i])
- break;
- udelay(200);
- }
-
if (!(cpu_callin_map[i])) {
- printk("Processor %d is stuck.\n", i);
+ printk(KERN_ERR "Processor %d is stuck.\n", i);
return -ENODEV;
}
@@ -255,14 +209,17 @@ static void smp4d_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1,
unsigned long arg2, unsigned long arg3,
unsigned long arg4)
{
- if(smp_processors_ready) {
+ if (smp_processors_ready) {
register int high = smp_highest_cpu;
unsigned long flags;
spin_lock_irqsave(&cross_call_lock, flags);
{
- /* If you make changes here, make sure gcc generates proper code... */
+ /*
+ * If you make changes here, make sure
+ * gcc generates proper code...
+ */
register smpfunc_t f asm("i0") = func;
register unsigned long a1 asm("i1") = arg1;
register unsigned long a2 asm("i2") = arg2;
@@ -284,7 +241,7 @@ static void smp4d_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1,
cpu_clear(smp_processor_id(), mask);
cpus_and(mask, cpu_online_map, mask);
- for(i = 0; i <= high; i++) {
+ for (i = 0; i <= high; i++) {
if (cpu_isset(i, mask)) {
ccall_info.processors_in[i] = 0;
ccall_info.processors_out[i] = 0;
@@ -300,17 +257,17 @@ static void smp4d_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1,
do {
if (!cpu_isset(i, mask))
continue;
- while(!ccall_info.processors_in[i])
+ while (!ccall_info.processors_in[i])
barrier();
- } while(++i <= high);
+ } while (++i <= high);
i = 0;
do {
if (!cpu_isset(i, mask))
continue;
- while(!ccall_info.processors_out[i])
+ while (!ccall_info.processors_out[i])
barrier();
- } while(++i <= high);
+ } while (++i <= high);
}
spin_unlock_irqrestore(&cross_call_lock, flags);
@@ -336,7 +293,7 @@ void smp4d_percpu_timer_interrupt(struct pt_regs *regs)
static char led_mask[] = { 0xe, 0xd, 0xb, 0x7, 0xb, 0xd };
old_regs = set_irq_regs(regs);
- bw_get_prof_limit(cpu);
+ bw_get_prof_limit(cpu);
bw_clear_intr_mask(0, 1); /* INTR_TABLE[0] & 1 is Profile IRQ */
cpu_tick[cpu]++;
@@ -349,7 +306,7 @@ void smp4d_percpu_timer_interrupt(struct pt_regs *regs)
profile_tick(CPU_PROFILING);
- if(!--prof_counter(cpu)) {
+ if (!--prof_counter(cpu)) {
int user = user_mode(regs);
irq_enter();
@@ -361,8 +318,6 @@ void smp4d_percpu_timer_interrupt(struct pt_regs *regs)
set_irq_regs(old_regs);
}
-extern unsigned int lvl14_resolution;
-
static void __cpuinit smp_setup_percpu_timer(void)
{
int cpu = hard_smp4d_processor_id();
@@ -374,16 +329,16 @@ static void __cpuinit smp_setup_percpu_timer(void)
void __init smp4d_blackbox_id(unsigned *addr)
{
int rd = *addr & 0x3e000000;
-
+
addr[0] = 0xc0800800 | rd; /* lda [%g0] ASI_M_VIKING_TMP1, reg */
- addr[1] = 0x01000000; /* nop */
- addr[2] = 0x01000000; /* nop */
+ addr[1] = 0x01000000; /* nop */
+ addr[2] = 0x01000000; /* nop */
}
void __init smp4d_blackbox_current(unsigned *addr)
{
int rd = *addr & 0x3e000000;
-
+
addr[0] = 0xc0800800 | rd; /* lda [%g0] ASI_M_VIKING_TMP1, reg */
addr[2] = 0x81282002 | rd | (rd >> 11); /* sll reg, 2, reg */
addr[4] = 0x01000000; /* nop */
@@ -392,17 +347,16 @@ void __init smp4d_blackbox_current(unsigned *addr)
void __init sun4d_init_smp(void)
{
int i;
- extern unsigned int t_nmi[], linux_trap_ipi15_sun4d[], linux_trap_ipi15_sun4m[];
/* Patch ipi15 trap table */
t_nmi[1] = t_nmi[1] + (linux_trap_ipi15_sun4d - linux_trap_ipi15_sun4m);
-
+
/* And set btfixup... */
BTFIXUPSET_BLACKBOX(hard_smp_processor_id, smp4d_blackbox_id);
BTFIXUPSET_BLACKBOX(load_current, smp4d_blackbox_current);
BTFIXUPSET_CALL(smp_cross_call, smp4d_cross_call, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(__hard_smp_processor_id, __smp4d_processor_id, BTFIXUPCALL_NORM);
-
+
for (i = 0; i < NR_CPUS; i++) {
ccall_info.processors_in[i] = 1;
ccall_info.processors_out[i] = 1;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.